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26x+21-23x=-9
Subtract 23x from both sides.
3x+21=-9
Combine 26x and -23x to get 3x.
3x=-9-21
Subtract 21 from both sides.
3x=-30
Subtract 21 from -9 to get -30.
x=\frac{-30}{3}
Divide both sides by 3.
x=-10
Divide -30 by 3 to get -10.